linux-kernel - Re: Patch "i386: Relocatable kernel support" causes instant reboot

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Message-ID: <20061221031326.GC30299@in.ibm.com>
Date:	Thu, 21 Dec 2006 08:43:26 +0530
From:	Vivek Goyal <vgoyal@...ibm.com>
To:	Jean Delvare <khali@...ux-fr.org>
Cc:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Andi Kleen <ak@...e.de>, LKML <linux-kernel@...r.kernel.org>
Subject: Re: Patch "i386: Relocatable kernel support" causes instant reboot

On Thu, Dec 21, 2006 at 02:13:54PM +0100, Jean Delvare wrote:
> On Thu, 21 Dec 2006 06:38:14 +0530, Vivek Goyal wrote:
> > On Thu, Dec 21, 2006 at 03:32:33AM -0700, Eric W. Biederman wrote:
> > > Grr.  I guessed the problem was to late in the game it seems the problem
> > > is in setup.S  Before we switch to 32bit mode.
> > >
> > > Ok.  There is almost enough for inference but here is a patch of stops
> > > for setup.S let's see if one of those will stop the reboots.
> > >
> > > I have a strong feeling that we are going to find a tool chain issue,
> > > but I'd like to find where we ware having problems before we declare
> > > that to be the case.
> >
> > Looks like it might be a tool chain issue. I took Jean's config file and
> > built my own kernel and I am able to boot the kernel. But I can't boot
> > his bzImage. I observed the same behaviour as jean is experiencing. It jumps
> > back to BIOS.
> 
> I can only confirm that. I installed a more recent system on the same
> hardware, rebuilt a kernel from the same config file, and now it boots
> OK. So it's not related to the hardware. It has to be a compilation-time
> issue.
> 

Hi Jean,

Looks like you have already trashed your setup. If not, is it possible to
upload the output of "objdump -D arch/i386/boot/setup.o"? This will give
some info regarding what assembler is doing.

Thanks
Vivek
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